Doctor in Malaysia typically facing few issues:
1. High educational cost if you are not Malays
2. Long working hours
3. In contract term
4. Lack of opportunities to pursue further studies (specialist) if you are not Malays
5. Pay is not as generous as other fields
6. Harsh working environment

I think the worst part is even you become a doctor you still need lots of money to support your study. And government won't sponsor you unless you are Malay. I believe you know cardio specialists news, you will likely be one of them. generally, I won't recommend you pursue it unless your family is rich.